What are the situations when Roon opens a new Stream closing the old one


I’m facing some occasional drop out/gliches which sounds to me that Roon is closing an old stream and creating a new one because of the short delay.

I understand that Roon closes the old stream and open a new one when the format changes from one song to another. However would like to understand what are the other situations when Roon will change the stream while playing a large number of tracks in a Playlist.